diff --git a/.gitmodules b/.gitmodules
index a23e16f..c7938b5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -64,3 +64,9 @@
 [submodule "libraries/drivers/mitutoyo"]
 	path = libraries/drivers/mitutoyo
 	url = https://github.com/vifino/CircuitPython-mitutoyo.git
+[submodule "libraries/helpers/base64"]
+	path = libraries/helpers/base64
+	url = https://github.com/jimbobbennett/CircuitPython_Base64
+[submodule "libraries/helpers/HMAC"]
+	path = libraries/helpers/HMAC
+	url = https://github.com/jimbobbennett/CircuitPython_HMAC
diff --git a/libraries/helpers/HMAC b/libraries/helpers/HMAC
new file mode 160000
index 0000000..5dc7973
--- /dev/null
+++ b/libraries/helpers/HMAC
@@ -0,0 +1 @@
+Subproject commit 5dc7973be38405be3f2b0a686f09d9a358924b15
diff --git a/libraries/helpers/base64 b/libraries/helpers/base64
new file mode 160000
index 0000000..ab75a32
--- /dev/null
+++ b/libraries/helpers/base64
@@ -0,0 +1 @@
+Subproject commit ab75a32ab875f90920d6fe37d502c334c777d687